I have been reading about op amps and came across this description of a differentiator variant using a capacitor.
The author explains that current can go through the capacitor when there is changing voltage, but I struggle to understand how the capacitor does not block the DC voltage source. Could anybody explain how there can be current in this situation?
Best Answer
That's pretty much the definition of a circuit that acts like a differentiator.
It does block DC - that's the whole point of a differentiator - DC is irrelevant.